dc.contributor | Universidad Técnica de Machala | |
dc.contributor | Universidad de Oriente | |
dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.contributor | Universidade Federal de São Carlos (UFSCar) | |
dc.contributor | Escuela Politécnica Nacional | |
dc.contributor | Sapienza-Università di Roma | |
dc.date.accessioned | 2021-06-25T10:25:32Z | |
dc.date.accessioned | 2022-12-19T22:12:14Z | |
dc.date.available | 2021-06-25T10:25:32Z | |
dc.date.available | 2022-12-19T22:12:14Z | |
dc.date.created | 2021-06-25T10:25:32Z | |
dc.date.issued | 2021-01-01 | |
dc.identifier | Neotropical Ichthyology, v. 19, n. 1, p. 1-13, 2021. | |
dc.identifier | 1982-0224 | |
dc.identifier | 1679-6225 | |
dc.identifier | http://hdl.handle.net/11449/206037 | |
dc.identifier | 10.1590/1982-0224-2020-0103 | |
dc.identifier | S1679-62252021000100203 | |
dc.identifier | 2-s2.0-85102419751 | |
dc.identifier | S1679-62252021000100203.pdf | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/5386634 | |
dc.description.abstract | Parodontidae is a relatively small group of Neotropical characiform fishes consisting of three genera (Apareiodon, Parodon, and Saccodon) with 32 valid species. A vast cytogenetic literature is available on Apareiodon and Parodon, but to date, there is no cytogenetic data about Saccodon, a genus that contains only three species with a trans-Andean distribution. In the present study the karyotype of S. wagneri was described, based on both conventional (Giemsa staining, Ag-NOR, C-bands) and molecular (repetitive DNA mapping by fluorescent in situ hybridization) methods. A diploid chromosome number of 2n = 54 was observed in both sexes, and the presence of heteromorphic sex chromosomes of the ZZ/ ZW type was detected. The W chromosome has a terminal heterochromatin band that occupies approximately half of the long arm, being this band approximately half the size of the Z chromosome. The FISH assay showed a synteny of the 18S-rDNA and 5S-rDNA genes in the chromosome pair 14, and the absence of interstitial telomeric sites. Our data reinforce the hypothesis of a conservative karyotype structure in Parodontidae and suggest an ancient origin of the sex chromosomes in the fishes of this family. | |
dc.language | eng | |
dc.relation | Neotropical Ichthyology | |
dc.rights | Acesso aberto | |
dc.source | Scopus | |
dc.subject | Ag-NOR | |
dc.subject | Cytogenetics | |
dc.subject | FISH | |
dc.subject | Heterochromatin | |
dc.subject | ZW sex chromosomes | |
dc.title | Chromosome analysis in saccodon wagneri (Characiformes) and insights into the karyotype evolution of parodontidae | |
dc.type | Artículos de revistas | |